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Bug 1823108 [wpt PR 39064] - Fix a TextIterator crash in Greek text-transform, a=testonly 

Automatic update from web-platform-tests
Fix a TextIterator crash in Greek text-transform

CSS text-transform can change text length in either ways, resulting in
more or fewer characters in LayoutText. The former case is more well
known and has been largely worked around.

Now that we see the latter case being possible, this patch works around
it in TextIterator to avoid reaching a NOTREACHED().

Fixed: 1424324
Bug: 750990
Change-Id: I4b8ba886bcacc06e9e491badb30af98d0f22c37c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4351287
Reviewed-by: Koji Ishii <kojii@chromium.org>
Commit-Queue: Koji Ishii <kojii@chromium.org>
Auto-Submit: Xiaocheng Hu <xiaochengh@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1119018}

--

wpt-commits: ceb972b009e1b43c589dce3f36b050121493d2e0
wpt-pr: 39064
This commit is contained in:
Xiaocheng Hu 2023-03-20 20:18:05 +00:00 коммит произвёл moz-wptsync-bot
Родитель 0d52704118
Коммит f3b1dbb880
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21
testing/web-platform/tests/css/css-text/text-transform/reference/text-transform-upperlower-106-ref.html Normal file
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@ -0,0 +1,21 @@
<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Text Test: text-transform uppercase Greek acute diaeresis iota and selection</title>
<link rel="author" href="mailto:xiaochengh@chromium.org">
<style>
#target {
color: white;
background: red;
}
#target::selection {
background: green;
}
</style>
<p>The test passes if you see red below (by selecting the first letter only).</p>
<span id="target" lang="el">&#x0399;&#x0308;&#x03A1;</span>
<script>
window.getSelection().setBaseAndExtent(target.firstChild, 0, target.firstChild, 2);
</script>

25
testing/web-platform/tests/css/css-text/text-transform/text-transform-upperlower-106.html Normal file
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@ -0,0 +1,25 @@
<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Text Test: text-transform uppercase Greek acute diaeresis iota and selection</title>
<link rel="author" href="mailto:xiaochengh@chromium.org">
<link rel="help" href="https://drafts.csswg.org/css-text/#propdef-text-transform">
<link rel="match" href="reference/text-transform-upperlower-106-ref.html">
<meta name="assert" content="text-transform: uppercase will uppercase the Greek acute diaeresis iota by removing acute, and the rendered character is selectable.">
<style>
#target {
text-transform: uppercase;
color: white;
background: red;
}
#target::selection {
background: green;
}
</style>
<p>The test passes if you see red below (by selecting the first letter only).</p>
<span id="target" lang="el">&#x0399;&#x0308;&#x0301;&#x03A1;</span>
<script>
window.getSelection().setBaseAndExtent(target.firstChild, 0, target.firstChild, 3);
</script>